Aerospace & Defense Electronics Protection

Mission-critical electronics demand uncompromising reliability. HZO protects aerospace and defense systems with advanced conformal coatings and Parylene technologies engineered for harsh operating environments, thermal extremes, vibration, humidity, salt fog, and chemical exposure.

From avionics and radar systems to satellite electronics and ruggedized communications hardware, HZO coatings help improve reliability, extend operational life, and reduce field failures without impacting performance, weight, or form factor.

Protection against moisture, corrosion, salt fog, and contaminants
Ultra-thin coatings measured in microns
Low added weight and minimal impact on thermal or RF performance
Coverage for complex PCB geometries and densely populated assemblies
Meets aerospace and defense reliability requirements

PROTECTION CHARACTERISTIC	UNPROTECTED PCB	MECHANICAL SEAL	SILICONE/ACRYLIC COATINGS	PARYLENE COATINGS
Protection Barrier	None	Good, but can be compromised with drops & temperature.	Good, but can be thick & porous depending on application.	Excellent. Can peel if not properly applied.
Hydrophobic	No	No	Yes	Partial
Thickness	N.A.	Millimeters	μm – millimeters	2μm – 50μm
Water Protection	Poor	Good – Ingress Poor – Penetration	Good	Excellent
Salt / Chemical Protection	Poor	Poor	Varies	High
Durability	Low	Varies	Varies	High
Submersion Test Time to Failure	Seconds (IP Rating N.A.)	Varies	Varies	Days to Weeks (IPX7 – IPX8)

Modern aerospace and defense systems rely on increasingly compact, high-density electronics that must perform flawlessly in unforgiving conditions.

Mission-critical electronics are routinely exposed to:

Thermal cycling from extreme temperature shifts
Humidity and condensation
Salt fog and corrosive atmospheres
High altitude pressure variation
Mechanical shock and vibration
Hydraulic fluids, fuels, and harsh chemicals
Dust, debris, and particulate contamination

Without proper protection, these conditions can contribute to corrosion, dendritic growth, electrical leakage, insulation breakdown, and premature system failure.

HZO coatings create a thin, uniform protective barrier that helps safeguard sensitive electronics while maintaining the performance requirements demanded by aerospace and defense applications.

Coating Type	Chemistry	Key Strengths	Limitations	Typical Aerospace & Defense Uses
AR	Acrylic	Easy rework, fast drying, good moisture resistance	Lower chemical resistance	General avionics, instrumentation
ER	Epoxy	Strong chemical and abrasion resistance	Difficult to rework	Harsh-environment electronics
SR	Silicone	Excellent high-temperature flexibility	Lower abrasion resistance	High thermal cycling applications
UR	Polyurethane	Strong solvent and chemical resistance	More difficult rework	Fuel-adjacent and rugged systems
XY	Parylene (Paraxylylene)	Ultra-thin, pinhole-free, excellent dielectric and moisture barrier properties	Specialized deposition process	High-reliability aerospace, defense, and space electronics

Avionics and flight control electronics

Radar and RF systems

Satellite and space electronics

Ruggedized communications devices

UAV and drone electronics

Navigation and guidance systems

Sensor modules

Power electronics and control systems

Tactical computing hardware

Military wearables and portable systems

HZO supports applications requiring protection against conditions associated with standards and test methodologies such as:

MIL-STD-810 environmental testing
IPC-CC-830 conformal coating qualification
NASA workmanship requirements
Thermal shock and thermal cycling
Salt fog and humidity exposure
Vibration and mechanical stress
Low outgassing requirements for space applications

Aerospace conformal coatings are commonly selected based on dielectric performance, adhesion, chemical resistance, flexibility, outgassing, and long-term environmental durability.